Question

Question 33

2 pts

Which of the following statements about the process of DNA replication is true?

  

It involves the enzyme DNA ligase, which corrects point mutations.

  

It utilizes DNA polymerase, which catalyzes the reaction that adds a new nucleotide to the growing strand.

  

The sequence on the new strand is always identical to one of the old parent strands.

   

Adenine pairs with guanine, and cytosine pairs with thymine.

Question 34

2 pts

The DNA base sequence TTGCGATCG on the parent strand would code for which of the following sequences on the newly synthesized strand?

  

ACGCTAGC

   

CCATAGCTA

   

GGTATCGAT

   

AACGCTAGC

Question 35

2 pts

A DNA sample has 20% C, 23% G, 27% T, and 30% A. This sample must have come from ________.

  

a pair of homologous chromosomes

   

a bacterial cell

   

a double-stranded piece of DNA

   

a single strand of DNA

Question 36

2 pts

For a mutation to play any heritable role, it must _______.

  

occur in a gamete

   

occur in a somatic cell

   

occur on a sex chromosome

   

cause a phenotypic change in the individual that has the mutation

Question 37

2 pts

Which of the following statements about gene mutations is false?

  

They are responsible for most of the phenotypic differences between siblings.

   

They may result in a genetic disorder.

   

They may result in an adaptation.

   

They may have no phenotypic effect on an organism.

Question 38

2 pts

The nucleotides in one strand of DNA are attached to the nucleotides of another strand of DNA by _______.

  

hydrogen bonds between phosphates

   

bonds between the sugar of one nucleotide and the base of the next

   

bonds between the phosphate of one nucleotide and the base of the next

   

hydrogen bonds between complementary bases

Answer 1